Means for securing brake-linings to their foundation-blocks.



H.FRO0D. MEANS FOR'SECURING BRAKE LIN INGS TO THEIR FOUNDATION BLOCKS.

APPLICATION FILEQ SEPT-'1, I914.

1,180,026. a Patented Apr. 18,1916.

THB CPLUMBIA PLANDGRAPH ,CO., WASHINGTON. D. C.

tional view of part of the brake shown in Fig. 1, the View being taken along the axis of a wooden peg. Fig. 4 illustrates a wooden peg which differs in form from that shown in Fig. 1.

Referring to Fig 1, A is a foundation block, and B is a strip of braking fabric secured in place along the face of the block by wooden pegs C. One of such pegs is shown in Fig. 2. This peg is shown in Fig. 3 as driven home in a brake block A, through a strip of fabric B. WVhen so driven home the projecting head of the peg is cut off level with the outer surface of the strip B so to give a flush surface to such strip and its fastening pegs as shown in Fig. 1. The peg C has a hole D extending axially through it from end to end. As will be seen from Fig. 3 this hole D permits free escape of air from the bottom of the hole E in the block A as the peg is driven down such hole. It is impossible for air in a state of compression above atmospheric to accumulate or remain between the end of the peg and the bottom of the hole E. A hole such as is shown at F, Fig. 3, may be drilled through the block A to the bottom of the hole E, any air displaced through the hole F escaping between the contiguous surfaces of the block A and the fabric B.

The head of the peg C may be of other than the spherical form shown in Figs. 2 and 3, while still being of such a formation as to confine the blows of the hammer to the center of the head in order to avoid splitting the pin, and to provide a swelling or equivalent part which prevents the frictional substance B rising from its foundation. A peg with such a modified form of head is shown in Fig. 4 where the outer part of the head is in the form of a truncated cone.

What I claim is A brake block comprising in combination a foundation block, a strip of frictional fabric, non-metallic pegs securing the said fabric to the said foundation block and air vents putting the bottom of the holes containing the pegs in communication with the atmosphere, substantially as described.

In witness whereof I have hereunto set my hand in the presence of two subscribing Copies of this patent may be obtained for five cents each, by addressing the "Commissioner 0! Patents. Washington, D. G.

. wuamlwumaaata 

